Improve errors raising by parser

smnp/ast/node/invocation.py

@@ -2,6 +2,7 @@ from smnp.ast.node.access import AccessNode
 from smnp.ast.node.expression import ExpressionNode
 from smnp.ast.node.iterable import abstractIterableParser
 from smnp.ast.node.model import Node
+from smnp.ast.parser import Parser
 from smnp.token.type import TokenType
 
 
@@ -9,7 +10,8 @@ class ArgumentsListNode(Node):
 
     @classmethod
     def _parse(cls, input):
-        return abstractIterableParser(ArgumentsListNode, TokenType.OPEN_PAREN, TokenType.CLOSE_PAREN, ExpressionNode.parse)(input)
+        return abstractIterableParser(ArgumentsListNode, TokenType.OPEN_PAREN, TokenType.CLOSE_PAREN,
+                                      Parser.doAssert(ExpressionNode.parse, "expression"))(input)
 
 
 class FunctionCall(AccessNode):